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Grade Nickel Ores By Fungi Metabolic Acids

1 scie311 industrial & environmental biotechnology biomining and bioleaching of ores ms. grace n. ijoma key concepts • bioleaching • biomineralization • biooxidation bioleaching • the dissolution of metals from their mineral source by certain naturally occurring microorganisms or • the use of microorganisms to transform elements so that the elements can be extracted from a material .

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  • ‪Peter G. Tzeferis‬ - ‪Google Scholar‬
    ‪Peter G. Tzeferis‬ - ‪Google Scholar‬

    2001. leaching of nickel and iron from greek non-sulphide nickeliferous ores by organic acids. pg tzeferis, s agatzini-leonardou. hydrometallurgy 36 (3), 345-360. , 1994. 86. 1994. leaching of a low grade hematitic laterite ore using fungi and biologically produced acid metabolites. pg tzeferis.

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  • Us6395061b1 - Process For Organic Acid Bioleaching Of Ore
    Us6395061b1 - Process For Organic Acid Bioleaching Of Ore

    A process for leaching an ore that contains nickel and magnesium includes mixing a microorganism that is capable of producing an organic acid, a nutrient, and an ore that contains nickel and magnesium for a period of time to dissolve the nickel and form a solution containing a nickel salt and a magnesium salt, separating the nickel from the magnesium in the salt solution.

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  • Figure 4 From Nickel Laterite Processing Technologies
    Figure 4 From Nickel Laterite Processing Technologies

    A review has been completed of current and proposed processing technologies for nickel laterite ores. although future supplies of nickel depend on laterite ores, their processing is inherently energy intensive and expensive as, unlike sulphide ores, they cannot be significantly upgraded, meaning the entire ore needs to be treated in the process.

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  • Bioleaching Of Low Grade Nickel Ore Using Indigenous Fungi
    Bioleaching Of Low Grade Nickel Ore Using Indigenous Fungi

    Abstract. in this research, the biological leaching of nickel by indigenous fungi isolated from indonesian limonite was studied to develop a feasible technique for microbial recovery of nickel from low grade nickel ore. xrd analyses indicated that goethite, alumina and quartz were major mineral composition of the ore.

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  • Effects Of Several Parameters On Nickel Extraction From
    Effects Of Several Parameters On Nickel Extraction From

    Aspergillus niger is a prominent fungi that has been used for bioleaching of nickel laterite ore and commercial production of citric acid. series of shake flask bioleaching assays have been conducted to study the effects of ore type, ore particle size distribution, solid percentage, and substrate volume percentages as well as sulphur addition on the nickel extraction from indonesian laterite ore.

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  • Nickel Leaching From Laterite Ores By Combination Of
    Nickel Leaching From Laterite Ores By Combination Of

    tang and m. valix, “ leaching of low-grade nickel ores by fungi metabolic acids,” in new perspectives on very large-scale operations, separation technology vi, edited by c. fell, et al. (eci symposium series, australia, 2004), pp 1– 16.

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  • Utilization Of Metabolic Citric Acid From Aspergillus
    Utilization Of Metabolic Citric Acid From Aspergillus

    Citric acid has been proved to be the most effective organic acid for nickel extraction from nickel lateritic ores. citric acid can be produced from fungal metabolism by utilizing several types of carbon source as fungal nutrient. in the current experiment, production of metabolic citric acid from metabolism of aspergillus niger by using corn starch as a carbon source was investigated.

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  • Indirect Bioleaching Of Low-Grade Nickel Limonite And
    Indirect Bioleaching Of Low-Grade Nickel Limonite And

    therefore, the indirect bioleaching of low-grade nickel lateritic ores using fungal metabolic organic acids by the chemoorganotrophic fungus aspergillus niger was established in this study with the following reasons, (1) chemoorganotrophic leaching microbes are able to grow in a less selective environment and have a high tolerance compared with acidophilic chemolithoautotrophs so .

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  • Dissolution Kinetics Of Nickel Laterite Ore Using
    Dissolution Kinetics Of Nickel Laterite Ore Using

    Effect of acids type on leaching. fig. 1 shows the percentage leaching of nickel for different acids at time intervals of 40, 80 and 120 h at a concentration of 1 m. from the figure, it is evident that oxalic acid is the most efficient leaching agent compared to the other two acids (figure 1).this may be due to the fact that the extent of dissolution is dependent on the acid activity (tang and .

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  • Microbial Leaching For Recovery Of Nickel And Cobalt From
    Microbial Leaching For Recovery Of Nickel And Cobalt From

    chaerun sk, minwal wp, mubarok mz (2017) indirect bioleaching of low-grade nickel limonite and saprolite ores using fungal metabolic organic acids generated by aspergillus niger. hydrometallurgy 174:29–37 crossref google scholar.

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  • (Pdf) Mechanisms Important For Bioleaching And Metal
    (Pdf) Mechanisms Important For Bioleaching And Metal

    Fungi are heterotrophic and do not perform photosynthesis (glazer and nikaido, 2007). these microorganisms secrete hydroxycarboxylic acids which dissolve nickel .

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  • Extraction Of Copper And Cobalt From Oxidized Ore Using
    Extraction Of Copper And Cobalt From Oxidized Ore Using

    Heterotrophic fungi involving the use of fungal metabolic acids has been attempted. higher recoveries have been attained in the field of metal extraction from low-grade non-sulphidic ores using .

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  • Bioleaching Of Low Grade Nickel Ore Using
    Bioleaching Of Low Grade Nickel Ore Using

    In this research, the biological leaching of nickel by indigenous fungi isolated from indonesian limonite was studied to develop a feasible technique for microbial recovery of nickel from low grade nickel ore. xrd analyses indicated that goethite, alumina and quartz were major mineral composition of the ore.

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  • Microbial Transformations Of Radionuclides Released
    Microbial Transformations Of Radionuclides Released

    Including cu and ni from copper-nickel concentrates, cu from low-grade copper ore, uranium from granites, and potassium from leucite. microbially produced dicarboxylic acids, oxalic, isocitric, citric, succinic, ketogluconic acid, polyhydroxy acids, and phenolic compounds such as.

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  • Indirect Bioleaching Of Low-Grade Nickel Limonite And
    Indirect Bioleaching Of Low-Grade Nickel Limonite And

    Indirect bioleaching of low-grade nickel limonite and saprolite ores using fungal metabolic organic acids generated by aspergillus niger siti khodijah chaerun a,b,⁎ , robi suryaning sulistyo c .

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  • Metals Extraction From Sulfide Ores With Microorganisms
    Metals Extraction From Sulfide Ores With Microorganisms

    fungi can produce certain organic acids, amino acids, and other metabolites, which are involved in leaching from ores (table 1). these metabolites dissolve metals either by metal ion displacement from the ore via hydrogen ion or by chelates creation and solubilize metals.

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  • Bioleaching: Metal Solubilization By Microorganisms | Fems
    Bioleaching: Metal Solubilization By Microorganisms | Fems

    for such ores, research is being done on the use of heterotrophic bacteria and fungi. in this case metals are dissolved by organic acids or complexing or chelating agents produced by the bacteria or fungi . studies on silicate nickel ores have shown that nickel is dissolved by organic acids produced by microorganisms.

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  • Microbial Assisted Leaching Of Nickel Laterites
    Microbial Assisted Leaching Of Nickel Laterites

    microbial leaching of non-sulphide ores, especially oxides and silicates, represents a new these ores, including laterites, chemoorganotrophic leaching using fungi is necessary. this is because the organic acids metabolically produced by fungi have a dual effect of providing hydrogen ions for acidolysis of minerals and complexing metals due to their chelating capacity .

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  • Mineral Leaching Of Non-Sulphide Nickel Ores Using
    Mineral Leaching Of Non-Sulphide Nickel Ores Using

    the results showed that extensive low-grade laterite domestic sources are generally amenable to bioleaching when micro-organisms were cultivated in the presence of the ore. nickel recoveries were as high as 60% using hydroxycarboxylic acid producing strains of aspergillus and penicillium codes a3, p2. cobalt recovery achieved was around 50%.

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  • Extraction Of Metals From Electronic Waste By
    Extraction Of Metals From Electronic Waste By

    Kinetics of limonite and nontronite ore leaching by fungi metabolic acids. was successfully achieved within a 300 d leaching process from the jinchuan low grade nickel sulfide mineral ore .

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  • (Pdf) Extraction Of Copper And Cobalt From Oxidized Ore
    (Pdf) Extraction Of Copper And Cobalt From Oxidized Ore

    Leaching of low grad e limonite and nontronite ores by fungi metabolic organic acid on nickel extraction from low-grade indonesian saprolitic ores was evaluated. acids, can extract nickel .

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  • Minerals Engineering Conferences - Processing Of Nickel
    Minerals Engineering Conferences - Processing Of Nickel

    Leaching of low grade limonite and nontronite ores by fungi metabolic acids j.a. tang and m. valix (university of sydney, australia) bioleaching nickel laterite ores using multi-metal tolerant aspergillus foetidus organism l. le, j. tang, d. ryan and m. valix (university of sydney, australia).

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  • Minerals Engineering Conferences - Processing Of Nickel
    Minerals Engineering Conferences - Processing Of Nickel

    Leaching of low grade limonite and nontronite ores by fungi metabolic acids j.a. tang and m. valix (university of sydney, australia) studies concerning nickel electrowinning from acidic and alkaline electrolytes m. pasquali and c. lupi (university of rome “la sapienza”, italy).

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  • (Pdf) Leaching Of Low Grade Limonite And Nontronite Ores
    (Pdf) Leaching Of Low Grade Limonite And Nontronite Ores

    Leaching of low grade limonite and nontronite ores by fungi metabolic acids. minerals engineering, 2006. m. valix. j. tang. m. valix. j. tang. download pdf. download full pdf package. this paper. leaching of low grade limonite and nontronite ores by fungi metabolic acids .

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  • Jessica Tang - Academia.Edu
    Jessica Tang - Academia.Edu

    Leaching of low grade nickel ores by fungi metabolic acids more. by jessica tang. publication date: 2006 • using halotolerant aspergillus foetidus in bioleaching nickel laterite ore more. by jessica tang. publication date: 2009.

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  • Leaching Of Low- Grade Nickel Ores By Fungi Metabolic Acids
    Leaching Of Low- Grade Nickel Ores By Fungi Metabolic Acids

    Leaching of low- grade nickel ores by fungi metabolic acids . by jessica tang and marjorie valix. get pdf (912 kb) abstract. this study was designed to investigate the nature of nickel and cobalt dissolution from limonite and weathered saprolite ores. chemical leaching was conducted using 1 to 3m of citric, lactic and malic acids.

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  • Leaching Of Low- Grade Nickel Ores By Fungi Metabolic
    Leaching Of Low- Grade Nickel Ores By Fungi Metabolic

    Leaching of low- grade nickel ores by fungi metabolic acids jessica tang and marjorie valix department of chemical engineering university of sydney, nsw, 2006, australia t: +61(0)2 9351 4995; f: +61(0)2 9351 2854; e: mvalix abstract this study was designed to investigate the nature of nickel and cobalt dissolution.

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  • Professor Marjorie Valix
    Professor Marjorie Valix

    Leaching of low-grade nickel ores by fungi metabolic acids. 2004 eci conference on separations technology vi: new perspectives on very large-scale operations, online: the berkeley electronic press. deepatana, a., valix, m. (2006). recovery of nickel and cobalt from organic acid complexes using aminophosphonate chelating resin.

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  • Atmospheric Acid Leaching Of Nickel Laterites Review. Part
    Atmospheric Acid Leaching Of Nickel Laterites Review. Part

    leaching low-grade nickel ores by fungi metabolic acids c. fell , g.e. keller ii (eds.) , 2004 engineering conferences international (eci) conference on separations technology vi: new perspectives on very large scale operations , berkeley electronic press ( 2006 ).

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  • Influence Of Organic Acids On Pentlandite Bioleaching By
    Influence Of Organic Acids On Pentlandite Bioleaching By

    tang j, valix m (2004) leaching of low-grade nickel ores by fungi metabolic acids. in: refereed proceedings separations technology vi: new perspectives on very large-scale operations. eci digital archives. tuttle jh, dugan pr, apel wa (1977) leakage of cellular material from thiobacillus ferrooxidans in the presence of organic acids. appl .

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